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[84.106.84.65]) by smtp.gmail.com with ESMTPSA id u49sm3033893edm.37.2019.02.19.07.53.41 (version=TLS1_3 cipher=AEAD-AES128-GCM-SHA256 bits=128/128); Tue, 19 Feb 2019 07:53:42 -0800 (PST) From: Hans de Goede Subject: False positive "do_IRQ: #.55 No irq handler for vector" messages on AMD ryzen based laptops To: Thomas Gleixner Cc: Linux Kernel Mailing List Message-ID: <95e76875-f6b2-cbea-cd74-dc14ee77b2f8@redhat.com> Date: Tue, 19 Feb 2019 16:53:41 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.5.0 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Thomas, Various people are reporting false positive "do_IRQ: #.55 No irq handler for vector" messages on AMD ryzen based laptops, see e.g.: https://bugzilla.redhat.com/show_bug.cgi?id=1551605 Which contains this dmesg snippet: Feb 07 20:14:29 localhost.localdomain kernel: smp: Bringing up secondary CPUs ... Feb 07 20:14:29 localhost.localdomain kernel: x86: Booting SMP configuration: Feb 07 20:14:29 localhost.localdomain kernel: .... node #0, CPUs: #1 Feb 07 20:14:29 localhost.localdomain kernel: do_IRQ: 1.55 No irq handler for vector Feb 07 20:14:29 localhost.localdomain kernel: #2 Feb 07 20:14:29 localhost.localdomain kernel: do_IRQ: 2.55 No irq handler for vector Feb 07 20:14:29 localhost.localdomain kernel: #3 Feb 07 20:14:29 localhost.localdomain kernel: do_IRQ: 3.55 No irq handler for vector Feb 07 20:14:29 localhost.localdomain kernel: smp: Brought up 1 node, 4 CPUs Feb 07 20:14:29 localhost.localdomain kernel: smpboot: Max logical packages: 1 Feb 07 20:14:29 localhost.localdomain kernel: smpboot: Total of 4 processors activated (15968.49 BogoMIPS) It seems that we get an IRQ for each CPU as we bring it online, which feels to me like it is some sorta false-positive. I temporarily have access to a loaner laptop for a couple of weeks which shows the same errors and I would like to fix this, but I don't really know how to fix this. Note if you want I can set up root ssh-access to the laptop. Regards, Hans